MDCT-BASED COMPLEX PREDICTION STEREO CODING

Abstract

The invention provides methods and devices for stereo encoding and decoding using complex prediction in the frequency domain. In one embodiment, a decoding method, for obtaining an output stereo signal from an input stereo signal encoded by complex prediction coding and comprising first frequency-domain representations of two input channels, comprises the upmixing steps of: (i) computing a second frequency-domain representation of a first input channel; and (ii) computing an output channel on the basis of the first and second frequency-domain representations of the first input channel, the first frequency-domain representation of the second input channel and a complex prediction coefficient. The method comprises performing frequency-domain modifications selectively before or after upmixing.

Inventors

PURNHAGEN, HEIKO
VILLEMOES, LARS
CARLSSON, PONTUS

Assignees

Dolby International AB

Dates

Publication Date: 20260513
Application Date: 20110406